Some pros still do it and then the webcast mocks them. If you're just a recballer its fine, but I've found I'm a much better player and I have more fun since I learned to shoot lefty. If you can shoot lefty properly it makes playing the entire field so much easier.

If you want to get sponsored, present yourself as a mature adult, not a four year old with a crayon.

You can do it, the problem arises when you start running and shooting while doing it, having your left arm stretched like that will in my experience make your muzzle bounce more. But in a bunker in a pinch? sure why not.